x86/speculation: Update Speculation Control microcode blacklist

Web:        https://git.kernel.org/torvalds/c/1751342095f0d2b36fa8114d8e12c5688c455ac4
Commit:     1751342095f0d2b36fa8114d8e12c5688c455ac4
Parent:     14b1fcc62043729d12e8ae00f8297ab2ffe9fa91
Refname:    refs/heads/master
Author:     David Woodhouse <[email protected]>
AuthorDate: Sat Feb 10 23:39:22 2018 +0000
Committer:  Ingo Molnar <[email protected]>
CommitDate: Sun Feb 11 11:24:15 2018 +0100

    x86/speculation: Update Speculation Control microcode blacklist
    
    Intel have retroactively blessed the 0xc2 microcode on Skylake mobile
    and desktop parts, and the Gemini Lake 0x22 microcode is apparently fine
    too. We blacklisted the latter purely because it was present with all
    the other problematic ones in the 2018-01-08 release, but now it's
    explicitly listed as OK.
    
    We still list 0x84 for the various Kaby Lake / Coffee Lake parts, as
    that appeared in one version of the blacklist and then reverted to
    0x80 again. We can change it if 0x84 is actually announced to be safe.
    
    Signed-off-by: David Woodhouse <[email protected]>
    Cc: Andy Lutomirski <[email protected]>
    Cc: Arjan van de Ven <[email protected]>
    Cc: Borislav Petkov <[email protected]>
    Cc: Dan Williams <[email protected]>
    Cc: Dave Hansen <[email protected]>
    Cc: David Woodhouse <[email protected]>
    Cc: Greg Kroah-Hartman <[email protected]>
    Cc: Josh Poimboeuf <[email protected]>
    Cc: Linus Torvalds <[email protected]>
    Cc: Peter Zijlstra <[email protected]>
    Cc: Thomas Gleixner <[email protected]>
    Cc: [email protected]
    Cc: [email protected]
    Cc: [email protected]
    Cc: [email protected]
    Cc: [email protected]
    Cc: [email protected]
    Cc: [email protected]
    Link: http://lkml.kernel.org/r/[email protected]
    Signed-off-by: Ingo Molnar <[email protected]>
---
 arch/x86/kernel/cpu/intel.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
index 319bf989fad1..f73b8148dd55 100644
--- a/arch/x86/kernel/cpu/intel.c
+++ b/arch/x86/kernel/cpu/intel.c
@@ -123,8 +123,6 @@ static const struct sku_microcode spectre_bad_microcodes[] = {
 	{ INTEL_FAM6_KABYLAKE_MOBILE,	0x09,	0x84 },
 	{ INTEL_FAM6_SKYLAKE_X,		0x03,	0x0100013e },
 	{ INTEL_FAM6_SKYLAKE_X,		0x04,	0x0200003c },
-	{ INTEL_FAM6_SKYLAKE_MOBILE,	0x03,	0xc2 },
-	{ INTEL_FAM6_SKYLAKE_DESKTOP,	0x03,	0xc2 },
 	{ INTEL_FAM6_BROADWELL_CORE,	0x04,	0x28 },
 	{ INTEL_FAM6_BROADWELL_GT3E,	0x01,	0x1b },
 	{ INTEL_FAM6_BROADWELL_XEON_D,	0x02,	0x14 },
@@ -136,8 +134,6 @@ static const struct sku_microcode spectre_bad_microcodes[] = {
 	{ INTEL_FAM6_HASWELL_X,		0x02,	0x3b },
 	{ INTEL_FAM6_HASWELL_X,		0x04,	0x10 },
 	{ INTEL_FAM6_IVYBRIDGE_X,	0x04,	0x42a },
-	/* Updated in the 20180108 release; blacklist until we know otherwise */
-	{ INTEL_FAM6_ATOM_GEMINI_LAKE,	0x01,	0x22 },
 	/* Observed in the wild */
 	{ INTEL_FAM6_SANDYBRIDGE_X,	0x06,	0x61b },
 	{ INTEL_FAM6_SANDYBRIDGE_X,	0x07,	0x712 },
--
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